How should I put it? A fighter like Zagi—someone who specializes purely in martial arts, beam attacks, or telekinesis—would absolutely hate to run into another fighter of the same caliber.
To kill a fighter like Zagi, unless you are vastly superior to him, a peer who trains in only a single discipline will find it very hard to take him down. Only someone as well-rounded and versatile as him could go toe-to-toe with him among peers.
Take Jili, for instance. To kill Zagi, he would have to fight from a distance. He would first need to break through Zagi's opposing beams, pierce the passive damage-absorption of his physical body, and avoid the interference of his telekinesis. Most fatally, he would have to constantly watch out for Zagi's sudden assaults to avoid being beaten to death in close combat.
Chapter 289